This category is where any user support questions should be filed. Anything related to getting help using the toolkit is relevant---examples include getting the toolkit compiled on your machine, reporting bugs you've encountered, configuration questions, etc.
This category contains all discussion surrounding the current development work on the toolkit: examples include RFC-style discussions around feature design, issues encountered while adding a feature, design decisions, release planning, etc.
Discussion about this site, its organization, how it works, and how we can improve it. Note that this is not "MeTA", but a discussion on the website about the website.
This category contains community-written documentation about MeTA. Posts here are encouraged to be wikis that discuss how to accomplish certain tasks in using the toolkit.